Brand preference. In a small-scale experimental study of the relation between degree of brand liking (Y) and moisture content (XI) and sweetness (X2 ) of the product, the following results were obtained from the experiment based on a completely randomized design:

Obtain the scatter plot matrix and the correlation matrix. What information do these diagnostic aids provide here? b. Fit regression model below to the data. State the estimated regression function. How is b1 interpreted here?

regression models (assume i =1.....4):